An alternative approach to induced drag reduction

Induced drag constitutes approximately 40% of the total drag of subsonic civil transport aircraft at cruise conditions. Various types of winglets and several non-planar concepts, such as the C-wing, the joined wings, and the box plane, have been proposed for its reduction. Here, a new approach to i...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autor principal:	Nikolaos Kehayas
Formato:	article
Lenguaje:	EN
Publicado:	Vilnius Gediminas Technical University 2021
Materias:	drag reduction induced drag drag due to lift vortex drag lifting line theory lift distribution Motor vehicles. Aeronautics. Astronautics TL1-4050
Acceso en línea:	https://doaj.org/article/27baa65c7e0e4a098d4342aabd3407e7
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:27baa65c7e0e4a098d4342aabd3407e7
record_format	dspace
spelling	oai:doaj.org-article:27baa65c7e0e4a098d4342aabd3407e72021-11-25T14:49:11ZAn alternative approach to induced drag reduction10.3846/aviation.2021.156631648-77881822-4180https://doaj.org/article/27baa65c7e0e4a098d4342aabd3407e72021-11-01T00:00:00Zhttps://journals.vgtu.lt/index.php/Aviation/article/view/15663https://doaj.org/toc/1648-7788https://doaj.org/toc/1822-4180 Induced drag constitutes approximately 40% of the total drag of subsonic civil transport aircraft at cruise conditions. Various types of winglets and several non-planar concepts, such as the C-wing, the joined wings, and the box plane, have been proposed for its reduction. Here, a new approach to induced drag reduction in the form of a combination of an elliptical and an astroid hypocycloid lift distribution is put forward. Lift is mainly generated from high circulation in the center part of the wing and fades away along the semi-span towards the wing tip. Using lifting line theory, the analysis shows that for fixed lift and wingspan the combined lift distribution results in an induced drag reduction of 50% with respect to the elliptical distribution. Due to its wing planform the combined lift distribution leads to a 51.5% higher aspect ratio. If structural constraints are placed, then the higher aspect ratio may affect wing weight. Although any substantial increase of wing weight is not envisaged, further study of the matter is required. Zero-lift drag and lift-dependent drag due to skin friction and viscosity-related pressure remain unaffected. The proposed lift distribution is particularly useful in a blended wing-body design. Nikolaos KehayasVilnius Gediminas Technical Universityarticledrag reductioninduced dragdrag due to liftvortex draglifting line theorylift distributionMotor vehicles. Aeronautics. AstronauticsTL1-4050ENAviation, Vol 25, Iss 3 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	drag reduction induced drag drag due to lift vortex drag lifting line theory lift distribution Motor vehicles. Aeronautics. Astronautics TL1-4050
spellingShingle	drag reduction induced drag drag due to lift vortex drag lifting line theory lift distribution Motor vehicles. Aeronautics. Astronautics TL1-4050 Nikolaos Kehayas An alternative approach to induced drag reduction
description	Induced drag constitutes approximately 40% of the total drag of subsonic civil transport aircraft at cruise conditions. Various types of winglets and several non-planar concepts, such as the C-wing, the joined wings, and the box plane, have been proposed for its reduction. Here, a new approach to induced drag reduction in the form of a combination of an elliptical and an astroid hypocycloid lift distribution is put forward. Lift is mainly generated from high circulation in the center part of the wing and fades away along the semi-span towards the wing tip. Using lifting line theory, the analysis shows that for fixed lift and wingspan the combined lift distribution results in an induced drag reduction of 50% with respect to the elliptical distribution. Due to its wing planform the combined lift distribution leads to a 51.5% higher aspect ratio. If structural constraints are placed, then the higher aspect ratio may affect wing weight. Although any substantial increase of wing weight is not envisaged, further study of the matter is required. Zero-lift drag and lift-dependent drag due to skin friction and viscosity-related pressure remain unaffected. The proposed lift distribution is particularly useful in a blended wing-body design.
format	article
author	Nikolaos Kehayas
author_facet	Nikolaos Kehayas
author_sort	Nikolaos Kehayas
title	An alternative approach to induced drag reduction
title_short	An alternative approach to induced drag reduction
title_full	An alternative approach to induced drag reduction
title_fullStr	An alternative approach to induced drag reduction
title_full_unstemmed	An alternative approach to induced drag reduction
title_sort	alternative approach to induced drag reduction
publisher	Vilnius Gediminas Technical University
publishDate	2021
url	https://doaj.org/article/27baa65c7e0e4a098d4342aabd3407e7
work_keys_str_mv	AT nikolaoskehayas analternativeapproachtoinduceddragreduction AT nikolaoskehayas alternativeapproachtoinduceddragreduction
_version_	1718413369116983296

An alternative approach to induced drag reduction

Ejemplares similares